668049223867 has 4 divisors (see below), whose sum is σ = 697094842320. Its totient is φ = 639003605416.

The previous prime is 668049223847. The next prime is 668049223903. The reversal of 668049223867 is 768322940866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668049223867 - 2²⁷ = 667915006139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668049223817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14522809192 + ... + 14522809237.

It is an arithmetic number, because the mean of its divisors is an integer number (174273710580).

Almost surely, 2^668049223867 is an apocalyptic number.

668049223867 is a deficient number, since it is larger than the sum of its proper divisors (29045618453).

668049223867 is a wasteful number, since it uses less digits than its factorization.

668049223867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29045618452.

The product of its (nonzero) digits is 41803776, while the sum is 61.

The spelling of 668049223867 in words is "six hundred sixty-eight billion, forty-nine million, two hundred twenty-three thousand, eight hundred sixty-seven".